Add 21/84 and 63/54
1st number: 21/84, 2nd number: 1 9/54
21/84 + 63/54 is 17/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 54 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 84 × 9 = 756,
21/84 = 21 × 9/84 × 9 = 189/756 - Likewise, for the 2nd fraction, since 54 × 14 = 756,
63/54 = 63 × 14/54 × 14 = 882/756 - Add the two like fractions:
189/756 + 882/756 = 189 + 882/756 = 1071/756 - 1071/756 simplified gives 17/12
- So, 21/84 + 63/54 = 17/12
In mixed form: 15/12
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